Why my car keep overheating?
I have a 05 honda civic ex My coolant temperature been going up and down. It did it for the first time Fri night when i got off of work but o drove it the next morning and it drove just fine no problems at all. Then i drove it again Sun and had no problems again, drove it to work today no problems but when i got off of work tonight it was rising again. What could be the problem? It can't be the head gasket could it cause if it was it would be rising everytime i drove or am i wrong? I'm asking cause the head gasket is the worse case so i'm hoping it may be something small. Btw i don't know if this helps but when i get off of work at night i take the highway when i drove to work i take the back roads, that sat morning and sun evening i didn't drive on the highway either. Could that be the issue high speed?
The first thing to do would be to check the coolant level (if you haven't already).
It could be as simple as replacing the thermostat and flushing the cooling system, or it could require a head gasket replacement (at which point you should also replace the water pump and timing belt).
I would suggest taking it to a shop and having it looked at before overheating causes more damage to the engine.
I would bet on the head gasket. Sorry.
Make sure the radiator fans work. If it was overheating because of low coolant, the temperature wouldn't be going down after being up. If the fans don't come on at operating temperature, check the fan relay. Turn on the ac and see the fans run, and that means the fans DO work but the main fan relay is bad. Replace it- $15 plug n play part. Running while extremely overheated can blow a head gasket and cost you a barrel of money to fix.
90 percent chance your thermostat is failing. Cheap fix.
Well you have not looked at the engine or gave us any results from any troubleshooting you have done. The best thing is to see a mechanic because is it not likely you can fix the problem. It could be anything and we will be just guessing.
An air pocket in the cooling system causes that.
If you haven't even checked the coolant level in the radiator you're setting yourself up for a blown headgasket.
It may just be a hose leak or the water pump leaking.
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